Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3d824b4cd1729ba1ba34359e726ca0086b4f9732af9a4acde848b62633fc8750:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

error: pre-condition failed: listing has already been purchased
   --> 4eb8a10cb9f87357.NFTStorefront:243:16